You are viewing the permanent link for the record currently in effect, published 2026-07-07.
Lyons building permits
VerifiedLyons, Colorado — as published 2026-07-07.
Verified 2026-07-06 · Source
Codes adopted
Permit types & fees
Residential Building Permit (New Construction)
VerifiedRequired for new single-unit, duplex, and detached ADU construction in the Town of Lyons. Reviewed under the 2021 IRC/IBC as locally adopted (transitioning to the 2024 ICC series effective July 1, 2026 — confirm current operational status with SAFEbuilt), plus the Town's Climatic and Geographic Design Criteria. Permit processing, plan review, and inspections are handled by SAFEbuilt under contract to the Town.
Verified 2026-07-06 · Source
Requirements
- Plans must comply with the 2021 IRC/IBC as locally adopted (or 2024 series if operationally in effect at time of application — confirm with SAFEbuilt) and the Town's Climatic and Geographic Design Criteria: 30 psf ground snow load, 140 mph wind speed, Seismic Design Category B, 30-inch frost line depth, ice shield underlayment required
- Soils report by a Colorado licensed soils engineer required
- Foundation plans stamped by a Colorado licensed engineer; structural plans stamped by a structural engineer
- 2021 IECC energy code compliance required (REScheck or an Energy Compliance Report from an energy rating company), plus separate Manual J/D/S HVAC compliance documentation if not already included
- Stamped, signed, and sealed plot/site plan with full civil detail: setbacks, easements, grading/drainage (5% slope within first 10 ft of foundation, 2% minimum beyond), erosion-control BMPs, utility locations, and floodplain/wetland/ditch features if present
- Fire suppression requirements to be confirmed directly with the Lyons Fire Protection District (a separate special district from the Town Building Department)
- A large-format (22x34 or 24x36 inch) copy of the approved plan set must be kept on the job site until final inspections pass
- Floodplain Development Permit required in addition if any portion of the structure encroaches into the regulatory floodplain (contact Floodplain Administration, 303-823-6622 ext. 47)
- Wildfire Resiliency Code compliance required for permits applied for on or after July 1, 2026 (Class A roofing, noncombustible gutters, tempered/fire-rated glazing and doors, defensible-space zones)
Required documents
- RequiredBuilding Permit ApplicationSubmitted through the Town's Community Core online permit software
- RequiredSubmittal Requirements for New Detached Residential Structures (checklist)Soils report, foundation/structural/architectural plans, combined building/electrical/mechanical plans, energy compliance, stamped plot/site plan, erosion control BMPs
- Required2021 IECC Energy Code ComplianceREScheck or an Energy Compliance Report from an energy rating company
- OptionalFloodplain Development Permit ApplicationRequired only if the parcel/structure is within the regulatory floodplain
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $0 to $5,000 | $135 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Building Permit Fee — valuation $5,001 to $25,000 | $135 for the first $5,000 plus $16.00 for each additional $1,000 or fraction thereof, to and including $25,000 | — |
| Building Permit Fee — valuation $25,001 to $50,000 | $455 for the first $25,000 plus $12.00 for each additional $1,000 or fraction thereof, to and including $50,000 | — |
| Building Permit Fee — valuation $50,001 to $100,000 | $755 for the first $50,000 plus $9.00 for each additional $1,000 or fraction thereof, to and including $100,000 | — |
| Building Permit Fee — valuation $100,001 to $500,000 | $1,205 for the first $100,000 plus $7.00 for each additional $1,000 or fraction thereof, to and including $500,000 | — |
| Building Permit Fee — valuation $500,001 to $1,000,000 | $4,005 for the first $500,000 plus $6.00 for each additional $1,000 or fraction thereof, to and including $1,000,000 | — |
| Building Permit Fee — valuation $1,000,001 and up | $7,005 for the first $1,000,000 plus $5.00 for each additional $1,000 or fraction thereof | — |
| Plan Review Fee | 65% of the Building Permit Fee | — |
| Boulder County Open Space & Recycling Tax | (Valuation x 45%) x 1.185% | — |
| Park Fund Use Tax and General Fund Use Tax | (Valuation x 45%) x 3% | — |
| Park Tax (new living space, including basements) | $2.20 per sq ft | — |
| St. Vrain Valley Schools Fair Contribution Fee — Single Family | $551 per unit | — |
Residential Addition / Interior Remodel Permit
VerifiedRequired for additions and interior remodels to existing single-unit, duplex, and ADU structures in Lyons. Reviewed under the 2021 IRC as locally adopted. An addition of 500+ sq ft triggers Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026.
Verified 2026-07-06 · Source
Requirements
- Plans must comply with the 2021 IRC as locally adopted and the Town's Climatic and Geographic Design Criteria
- Structural plans stamped by a structural engineer required if the scope involves new framing, foundations, or removed structural elements
- 2021 IECC energy code compliance required for the affected/new area
- Additions of 500 sq ft or more trigger Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026
- Floodplain Development Permit required in addition if the parcel is within the regulatory floodplain
Required documents
- RequiredBuilding Permit ApplicationSubmitted through the Town's Community Core online permit software
- RequiredArchitectural/floor plans and structural plans (as applicable to scope)Scope-dependent submittal, per the Town's general submittal checklist framework
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (same valuation-based schedule as new construction) | $135 minimum, scaling per the valuation tiers in the Town's fee schedule (updated 6.16.25) | — |
| Plan Review Fee | 65% of the Building Permit Fee | — |
| Boulder County Open Space & Recycling Tax | (Valuation x 45%) x 1.185% | — |
| Park Fund Use Tax and General Fund Use Tax | (Valuation x 45%) x 3% | — |
| Park Tax (new living space only, including basements) | $2.20 per sq ft of NEW living space added | Not applicable to a like-for-like interior remodel that adds no floor area |
Electrical Permit
VerifiedRequired for installation, alteration, or repair of electrical systems in Lyons. Governed by the 2023 NEC as adopted. Lyons does not run its own certified electrical licensing program: electricians must hold a current Colorado State Electrical Board (DORA) license, which the Town/SAFEbuilt verifies contemporaneously at registration and, at inspectors' discretion, at the job site, per the Colorado Chapter ICC procedure required under SB19-156.
Verified 2026-07-06 · Source
Requirements
- Governed by the 2023 NEC as locally adopted
- Electricians must register with the Town/SAFEbuilt prior to performing permitted work and provide current Colorado State Electrical Board (DORA) license credentials, verified contemporaneously by Staff per the SB19-156 procedure
- Any change in an electrician's State-issued credentials on an active permit must be reported in writing by the permittee
- Fee calculated either under the Residential New Construction schedule (based on enclosed living area) or the general Electrical Permit Fee schedule (based on installation valuation) — not both
- State-licensed electricians are exempt from the Town's separate $50 Contractor License fee for electrical work
Required documents
- RequiredElectrical Permit ApplicationSubmitted through the Town's Community Core online permit software
- RequiredCurrent Colorado State Electrical Board (DORA) licenseVerified contemporaneously by Town/SAFEbuilt staff at registration
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential Electrical New Construction — up to 1,000 sq ft enclosed living area | $150 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Residential Electrical New Construction — 1,001 to 1,500 sq ft | $222 | — |
| Residential Electrical New Construction — 1,501 to 2,000 sq ft | $300 | — |
| Residential Electrical New Construction — over 2,000 sq ft | $300 plus $15.00 per 100 sq ft over 2,000 sq ft (always rounded up to the next 100 sq ft) | — |
| Electrical Permit Fee (valuation-based) — $2,000 or less | $150 | — |
| Electrical Permit Fee (valuation-based) — over $2,000 | $195 plus $15.00 per $1,000 over $2,000 (always rounded up to the next $1,000) | — |
| Construction Meter or Extra Inspections Fee | $135 | — |
| Mobile/Modular/Manufactured Home Set (per unit) | $135 | — |
| Temporary Heat Release | $70 | — |
| Re-inspection (Misc. Electric) | $135 | — |
Plumbing Permit
VerifiedRequired for installation, alteration, or repair of plumbing systems in Lyons, including water and sewer line replacement. Governed by the 2021 International Plumbing Code (IPC) as adopted. Lyons does not run its own certified plumbing licensing program: plumbers must hold a current Colorado State Plumbing Board (DORA) license, verified contemporaneously by the Town/SAFEbuilt per the HB19-1086 procedure.
Verified 2026-07-06 · Source
Requirements
- Governed by the 2021 IPC as locally adopted
- Plumbers must register with the Town/SAFEbuilt prior to performing permitted work and provide current Colorado State Plumbing Board (DORA) license credentials, verified contemporaneously by Staff per the HB19-1086 procedure
- Any change in a plumber's State-issued credentials on an active permit must be reported in writing by the permittee
- State-licensed plumbers are exempt from the Town's separate $50 Contractor License fee for plumbing work
Required documents
- RequiredBuilding/Plumbing Permit ApplicationSubmitted through the Town's Community Core online permit software
- RequiredCurrent Colorado State Plumbing Board (DORA) licenseVerified contemporaneously by Town/SAFEbuilt staff at registration
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Water Line Replacement (Single-Unit Residential One Stop) | $135 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Sewer Line Replacement (Single-Unit Residential One Stop) | $135 | — |
| Building Permit Fee (valuation-based, for plumbing work bundled into new construction/remodel scopes) | $135 minimum, scaling per the general valuation-based fee schedule | — |
| Plan Review Fee | 65% of the Permit Fee | — |
| Re-inspection Fee | $70 | — |
Mechanical / HVAC Permit
VerifiedRequired for heating, cooling, and ventilation equipment installation or replacement in Lyons, including furnace/air conditioner replacement. Governed by the 2021 International Mechanical Code (IMC) and 2021 International Fuel Gas Code (IFGC) as adopted.
Verified 2026-07-06 · Source
Requirements
- Governed by the 2021 IMC and 2021 IFGC as locally adopted
- Furnace/air conditioner replacement (each unit) billed under the Single-Unit Residential One Stop flat-fee schedule
- Mechanical plans (equipment locations, duct size/locations/terminations) required as part of the combined building/electrical/mechanical plan submittal for new construction and additions
Required documents
- RequiredBuilding/Mechanical Permit ApplicationSubmitted through the Town's Community Core online permit software
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Furnace/Air Conditioner Replacement (each unit) | $135 | Single-Unit Residential One Stop Building Permit Fees, updated 6.16.25 |
| Water Heater Replacement | $135 | — |
| Re-inspection Fee | $70 | — |
| Building Permit Fee (valuation-based, for mechanical work bundled into new construction/remodel scopes) | $135 minimum, scaling per the general valuation-based fee schedule | — |
Roofing Permit (Re-Roof)
VerifiedRequired for re-roofing work in the Town of Lyons, billed at a flat $135 Single-Unit Residential One Stop fee. Class A roofing material and noncombustible gutters/downspouts are required under the Wildfire Resiliency Code for permits applied for on or after July 1, 2026, when the replacement covers 25% or more of the roof.
Verified 2026-07-06 · Source
Requirements
- Billed under the Single-Unit Residential One Stop flat-fee schedule
- Per the Town's 2021 Reroof Building Guide, roof plan(s) and material schedule required at submittal
- Roof replacements of 25% or more trigger Wildfire Resiliency Code compliance (Class A roofing, noncombustible gutters/downspouts) for permits applied for on or after July 1, 2026
- Ice shield underlayment required per the Town's Climatic and Geographic Design Criteria
Required documents
- RequiredBuilding Permit Application — Re-Roof scopeSubmitted through the Town's Community Core online permit software
- RequiredRoof Plan and Material SchedulePer the Town's 2021 Reroof Building Guide
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Re-Roof (Single-Unit Residential One Stop) | $135 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Re-inspection Fee | $70 | — |
Rooftop Solar Photovoltaic (PV) Permit
VerifiedRequired for solar photovoltaic system installations in Lyons. Governed by the IRC and NEC Articles 690 & 705, per the Town's dedicated Solar Submittal Requirements (October 2025). Flat fees apply, distinct from the general valuation-based electrical fee schedule.
Verified 2026-07-06 · Source
Requirements
- Governed by the IRC and NEC Articles 690 (Solar PV Systems) and 705 (Interconnected Electric Power Production Sources)
- A professional engineer's seal/signature is required for all non-single-family/duplex PV installations, and for single-family/duplex installations of 10kW or more or that include generator/battery backup provisions
- A structural engineer's stamped letter is required for ALL projects (residential and commercial), confirming the existing structure can support the PV system per current code
- All PV installations require a Town-supplied production meter measuring direct PV output only
- Detailed one-line diagram, conductor ampacity calculations (NEC 690.8), equipment grounding conductor sizing (NEC 690.43/690.45), and rapid-shutdown compliance (NEC 690.12) required at submittal
- A qualified person must be present at the PV electrical inspection: for residential systems 200A or less, a licensed master/journeyman electrician, a residential wireman, or a NABCEP-certified solar installer (for rapid-shutdown testing only); for residential systems over 200A and all IBC structures, a licensed master or journeyman electrician only
Required documents
- RequiredSolar/Electrical Permit ApplicationSubmitted through the Town's Community Core online permit software
- RequiredTwo complete sets of PV design packageManufacturer cut sheets, one-line diagram, mounting details, all NEC 690/705 calculations per the Town's Solar Submittal Requirements
- RequiredStructural Engineer LetterStamped, Colorado-licensed structural engineer confirmation the structure supports the PV system; required for all projects
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Solar Permit Fee — Residential | $500 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Solar Permit Fee — Commercial | $1,000 | — |
Accessory Dwelling Unit (ADU) Permit
VerifiedRequired for construction of an Accessory Dwelling Unit (basement/attic apartment, addition, detached structure, or certified Tiny Home on Wheels) in the Town of Lyons. ADUs are approved through the standard building permit process (no separate use permit) in all zone districts that allow single-unit dwellings, subject to the Town's ADU Standards and Rules.
Verified 2026-07-06 · Source
Requirements
- Permitted in all zone districts allowing single-unit dwellings: R-1, R-2, R-2A, E, E-C, and any other zone district permitting single-unit homes
- Minimum size subject to applicable IRC requirements; maximum size equals the principal dwelling unit's size, or up to 800 sq ft if the principal unit is 800 sq ft or smaller (no size cap for a basement ADU)
- Maximum height per the underlying zone district: 30 ft (R-1, R-2, R-2A, E, A-1, A-2) or 35 ft (E-C)
- Subject to principal-building front/side setbacks and accessory-building rear setback requirements (or principal-building rear setback if the ADU is attached/internal)
- One ADU permitted per lot; two permitted if the lot exceeds 0.5 acres (21,780 sq ft); more than two on lots over 1 acre requires Community Development Department guidance
- No off-street parking requirement, no owner-occupancy requirement, no deed restriction required
- Short-term rentals (under 30 days) are prohibited in an ADU
- Detached ADUs under 800 sq ft do not require fire sprinklers; internal/attached ADUs do not require fire separation if smoke/CO alarms are interconnected with the principal dwelling
- Mobile homes, manufactured homes, and RVs may not be used as ADUs (certified Tiny Homes on Wheels may qualify with Community Development Department guidance)
- If the ADU does not meet these standards, a variance may be requested through the Community Development Department
Required documents
- RequiredBuilding Permit ApplicationADUs are processed as a standard building permit application, submitted through Community Core
- RequiredSubmittal Requirements for New Detached Residential Structures (checklist)Applies to detached ADUs; the checklist explicitly covers 'Single-Unit, Detached ADU, Duplex'
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (same valuation-based schedule as new construction) | $135 minimum, scaling per the valuation tiers in the Town's fee schedule | — |
| Plan Review Fee | 65% of the Building Permit Fee | — |
| Utility connection fees | $0 | ADUs are not required to pay water tap, sewer tap, or electric community investment fees per the Town's ADU Standards and Rules |
Demolition Permit
Required for demolition of a structure in the Town of Lyons, billed at a flat $135 Single-Unit Residential One Stop fee for single-unit residential demolitions.
Reviewed 2026-07-06 · Source
Requirements
- Billed under the Single-Unit Residential One Stop flat-fee schedule for single-unit residential demolitions
- Utility disconnections (water, sewer, electric) should be coordinated prior to demolition
Required documents
- RequiredDemolition Permit ApplicationSubmitted through the Town's Community Core online permit software
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Demolition (Single-Unit Residential One Stop) | $135 | Town of Lyons Building Permit Fees PDF, updated 6.16.25 |
| Re-inspection Fee | $70 | — |
Commercial Tenant Improvement Permit
Required for interior build-out/alteration of commercial tenant space in the Town of Lyons. Reviewed under the 2021 IBC as locally adopted. Billed under the general valuation-based Building Permit Fee schedule (no distinct commercial-TI flat fee is published).
Reviewed 2026-07-06 · Source
Requirements
- Governed by the 2021 IBC as locally adopted
- Fire suppression/alarm scope to be confirmed directly with the Lyons Fire Protection District
- Structural, electrical, mechanical, and plumbing plans required as applicable to the scope of work
- Solar commercial installations follow the Town's Solar Submittal Requirements (structural engineer letter required for all projects)
Required documents
- RequiredBuilding Permit Application — Commercial Tenant Improvement scopeSubmitted through the Town's Community Core online permit software
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (valuation-based, same general schedule as residential new construction) | $135 minimum, scaling per the valuation tiers in the Town's fee schedule | No distinct commercial-TI flat fee is published; billed under the general valuation-based schedule |
| Plan Review Fee | 65% of the Permit Fee | — |
| Boulder County Open Space & Recycling Tax | (Valuation x 45%) x 1.185% | — |
| Park Fund Use Tax and General Fund Use Tax | (Valuation x 45%) x 3% | — |
Deck / Covered Patio Permit
Required for construction of a new deck or covered patio in the Town of Lyons. Reviewed under the 2021 IRC as locally adopted, per the Town's Residential Deck Guide. A new or replacement deck triggers Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026.
Reviewed 2026-07-06 · Source
Requirements
- Governed by the 2021 IRC as locally adopted, per the Town's Residential Deck Guide
- Any new or replacement deck triggers Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026
- Retaining walls over 4 feet associated with a deck project require a building permit and engineering letter, and may require a safety railing
- Footings and structural connections to the primary structure must meet the 30-inch frost line depth requirement
Required documents
- RequiredBuilding Permit Application — Deck scopeSubmitted through the Town's Community Core online permit software
- RequiredResidential Deck Guide submittal packagePer the Town's 2021 Residential Deck Guide
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (valuation-based, same general schedule as new construction) | $135 minimum, scaling per the valuation tiers in the Town's fee schedule | No distinct flat deck fee is published on the fee PDF; billed under the general valuation-based schedule |
| Plan Review Fee | 65% of the Permit Fee | — |
EV Charger / EVSE Permit
VerifiedThe Town of Lyons has no dedicated EV-charger/EVSE application type or fee line item. Installing a Level 1/Level 2 EV charging circuit is electrical work billed under the same valuation-based Electrical Permit Fee schedule on the Town's Building Permit Fees PDF (updated 6.16.25) used for any other residential electrical alteration. With a population well under 10,000 (2020 Census), Lyons falls below the population threshold that makes Colorado HB24-1173's mandatory 3-business-day EV-permit decision timeline and model-code-adoption requirements directly applicable, and no Town ordinance or webpage was found adopting the EV Charging Model Land Use Code (EV MLUC) or an equivalent local standard.
Verified 2026-07-20 · Source
Requirements
- Electrical permit required for any new EV charging circuit or panel work, per the Town's standard Electrical Permit process
- Fee is calculated from the same valuation-based Electrical Permit Fee schedule used for all other residential electrical alterations (not a new-construction square-footage fee, since an EV charger retrofit is not new construction)
- Work must comply with the Town's currently adopted electrical code (International Residential Code / NEC editions as adopted by the Town of Lyons Building Department)
- As a municipality with population under Colorado HB24-1173's 10,000-resident threshold, Lyons is not a jurisdiction the statute mandates to adopt the state's model EV charging permitting code, an expedited 3-business-day decision timeline, or its own objective EV charging standards — no evidence was found that Lyons has voluntarily opted in
Required documents
- RequiredElectrical Permit ApplicationTown of Lyons standard electrical permit application; no separate EV-charger-specific form exists
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Electrical Permit Fee (valuation-based) — $2,000 or less | $150 | Town of Lyons Building Permit Fees PDF, updated 6.16.25, re-confirmed live 2026-07-20 by direct PDF fetch and full-text extraction — the applicable fee tier for a typical EV Level 2 charger circuit that does not rise above $2,000 in valuation |
| Electrical Permit Fee (valuation-based) — over $2,000 | $195 plus $15.00 per $1,000 over $2,000 (always rounded up to the next $1,000) | Town of Lyons Building Permit Fees PDF, updated 6.16.25, re-confirmed live 2026-07-20 — applies if a panel upgrade or larger charging installation pushes valuation above $2,000 |
Sources & verification
Verified against official sources. Last reviewed 2026-07-06.
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Lyons building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.